From: Pickell, Aaryn (Aaryn.Pickell@xxxxxxxxxxxxx)
Date: Sat May 19 2001 - 14:19:49 GMT-3
The battary backup-clock is called a calander. These are found in high-end
routers only (4500, 4700, 7000, etc.) They are not found in 2600s, 3600s,
or even 4000s. So, you won't be able to get time restored that way, unless
there is a high-end router around somewhere that you can sync off of. You
can't use your PC, unless they were nice enough to install third party NTP
software onto it, and I can't see them basing a test of your cisco ability
on how well you can use software written by people outside of cisco, and
distributed as shareware on the web.
And even if there is a high-end router, you have to configure it. The
internal clock is seperate from the calendar (they both store time and date,
though). NTP will normally update the clock, but you would have to
configure it to update the calendar:
ntp update-calendar
And then on reboot, you have to set the calendar to provide time to the
clock, so that the master can give time to all the ntp clients:
clock calendar-valid
So, according to the equipment list, a 4500 router may be included in the
lab exam.
(http://www.cisco.com/warp/customer/625/ccie/certifications/routing.html#45)
If there are no routers which may hold time after a reboot in your stack, I
would assume that you would be able to receive time from the backbone
routers? I'm just guessing here, but it's at least something to ask the
proctor about.
And really, if you're not sure how to proceed in a situation, ask the
proctor. The worst he can do is not answer you, and he might be able to add
some information that will let you perform the task. Ask if you can sync
time from a backbone device. If not, then ask him to manually set the time
on the master before testing your rack after reboot.
Aaryn Pickell - CCNP ATM, CCDP, MCSE
Senior Engineer - Routing Protocols
Getronics Inc.
Direct: 713-394-1609
Email:aaryn.pickell@getronics.com
This e-mail message and any attachments are confidential and may be
privileged. If you are not the intended recipient, please notify me
immediately by replying to this message and please destroy all copies of
this message and attachments. Thank you.
> -----Original Message-----
> From: Kris Foster [mailto:kris@krweb.net]
> Sent: Saturday, May 19, 2001 11:35 AM
> To: Sandro Ciffali
> Cc: ccielab@groupstudy.com; MAHeeba@itqan.co.ae
> Subject: Re: Key chains with NTP
>
>
> 2600/3600's should be able to keep their time. The poor little 2500's
> cannot.
>
> Kris,
>
> On Sat, 19 May 2001, Sandro Ciffali wrote:
>
> > Sorry for the confusion, I meant if the NTP server is
> > rebooted first it looses it's time.
> >
> > Sandro
> >
> > ----- Original Message -----
> > From: "Mohamed Heeba" <MAHeeba@itqan.co.ae>
> > To: "'Sandro Ciffali'" <sandyccie@yahoo.com>;
> > <ccielab@groupstudy.com>
> > Sent: Saturday, May 19, 2001 11:25 AM
> > Subject: RE: Key chains with NTP
> >
> >
> > > i didnt get that
> > > when u configure your router to synch with NTP
> > server and you reboot your
> > > router ..it will synch again with the time server
> > and get the valid time
> > > may be i got you wrong ..but this is the idea of
> > using NTP server
> > > thx
> > >
> > > > -----Original Message-----
> > > > From: Sandro Ciffali [SMTP:sandyccie@yahoo.com]
> > > > Sent: Saturday, May 19, 2001 8:03 AM
> > > > To: ccielab@groupstudy.com
> > > > Subject: Key chains with NTP
> > > >
> > > > This topic was probably discussed I am not sure
> > but i
> > > > need some more thoughts on this one.
> > > >
> > > > I know the Proctors reboot the routers before
> > checking
> > > > the configs just to make sure the results remain
> > same
> > > > even after a router reboot.
> > > >
> > > > So if you have been asked to configure a routing
> > > > protocol with authentication to accept a password
> > for
> > > > certain time period, You did this with NTP
> > > > configuration, But when the routers reboot they go
> > > > back to default time whcih is like 1992 or some
> > year,
> > > > So your NTP server will also go back in time then
> > how
> > > > do you expect it to work???
> > > >
> > > > Any thoughts on this???
> > > >
> > > > Thanks
> > > >
> > > > Sandro
> > > >
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